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5.905-26209.02

KMR 1250(KMR 1250 B, KMR 1250 LPG, KMR 1250 D)

1.091- . . .

Service Manual

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5.905-122

4-Stroke Internal

Combustion Engines

Service-Manual

5.905-122

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Foreword KMR 1250 B, LPG, D

Foreword

Good servicing requires extensive and relevant training as well as comprehensible referencedocuments.

We therefore offer basic and advanced training courses for the full range of our products to allservice technicians on a regular basis.

In addition, we produce service manuals for the major units in our product line. While these areideal for initial use as instruction manuals, they are designed to serve as an essential referencein the future.

To augment our product-related communications, we regularly distribute service informationbulletins providing details about ongoing product development.

Copyright Notice

Copyright 2002 by Alfred Kärcher GmbH & Co. All rights reserved. No part of this publication maybe reproduced, stored in a retrieval system, or transmitted in any form or by any means, i.e.,electronic, mechanical, photocopying, recording or otherwise, without the written permission ofAlfred Kärcher GmbH & Co.

ALFRED KÄRCHER GmbH & Co.Customer Service TrainingP.O. Box16071349 Winnenden, Germany

http://www.karcher.de

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KMR 1250 B, LPG, D Table of Contents

Contents

Unit functions ...........................................................................................................4-15Overview ............................................................................................................................... 4-5

View from front ..........................................................................................................................6

Controls .....................................................................................................................................7

Gasoline Engine (HONDA GX 270) ........................................................................................ 8-9

LP Gas Engine (HONDA GX 270) ....................................................................................... 10-11

Diesel Engine (YANMAR L 70 AE-DE) ............................................................................... 12-13

Steering and Drive Power ........................................................................................................14

Sweeping system ....................................................................................................................15

Troubleshooting Information ................................................................................... 4-15Starter Fails to Turn Engine ............................................................................................... 16-18

Starter Turns Engine but Engine Fails to Start ................................................................... 19-20

Engine Runs but Machine Fails to Move ............................................................................ 21-25

Maintenance Procedures (gasoline and LPG engine) ....................................................... 26-27

Maintenance Procedures (LPG engine) ............................................................................ 28-29

Maintenance Procedures (diesel engine) .......................................................................... 30-31

Parking Brake – No Function ...................................................................................................32

Brush Roller – Poor Performance ..................................................................................... 33-34

Brush Roller – No Rotation ......................................................................................................35

Side Brushes – Poor Sweeping Performance .........................................................................36

Excessive Unit Dusting...................................................................................................... 37-41Filter cleaning Motor – No Function .........................................................................................42

Hydraulic Unit – No Function ................................................................................................... 43

Debris Container – Very Slow Ascent ......................................................................................44

Debris Container – No Full Ascent ...........................................................................................45

Excessive Steering Free Play ..................................................................................................46

Hydraulic Block Diagram .......................................................................................48-49

Electrical Circuit Diagram ......................................................................................50-55

Maintenance Procedures for B, LPG & D Models ................................................56-57

Technical Specifications ........................................................................................58-59

Special Tools ........................................................................................................... 60-62

Index ........................................................................................................................63 -65

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Unit Functions KMR 1250 B, LPG, D

Drive system

– When the hood is lifted up toward the rear, allcomponents become accessible for mainte-nance purposes.

– Hydrostatic transmission with mechanical free-wheeling device provides variable control offorward and reverse driving speeds.

– Parking brake lever actuates transmission-mounted disc brake.

– No foot brake required. Transmission providesbraking effect.

– Transmission, impeller fan, brush roller andside brushes are belt-driven.

– Rear wheels are chain-driven.

– To start engine, driver must occupy operatorseat (seat contact switch).

– Discharge of debris container via electricallydriven hydraulic unit.

Sweeping system

– Brush roller counter-rotates against directionof unit motion (throw-over principle).

– Debris container is located at rear of brushroller.

– Two-position adjustment of brush roller viacontrol lever:

Center position: Rigid brush roller suspensionfor level surfaces.

Bottom position: Floating brush roller suspen-sion for uneven surfaces.

– Quick-change brush roller replacement. Notools required.

– Side brush automatically extends outwardwhen lowered.

– Coarse-dirt flap accommodates pickup of bev-erage cans, etc.

– Hydraulic discharge of debris container inraised position (two-hand operation).

Suction and filtering system

– Dust pickup at brush roller.

– Large-capacity dust filter with mechanical dustremoval.

– Each time engine is shut off, dust filter is sub-jected to automatic cleaning cycle of approx.15-second duration.

– Impeller fan with closeable exhaust-air hatchfor wet-sweeping operation.

– Quick-change dust filter replacement. No toolsrequired.

– Impeller fan driven by elastic belt. No tensionadjustment required.

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KMR 1250 B, LPG, D Unit Functions

Engine KMR 1250 B

– Single-cylinder, air-cooled gasoline engine(HONDA GX 270) w/ electric starter. Usesstandard grade unleaded gasoline.

– Engine features oil level sensor.

Engine 1250 LPGWith the exception of the conversion to run onliquefied petroleum gas (LPG), the unit is iden-tical to the basic KMR 1250 B version.

– The gasoline engine is the same as in the KMR1250 B (HONDA GX 270).

– The LP gas cylinder is mounted behind thedriver’s seat. As the gasoline tank is discon-nected, its use is strictly prohibited.

– The carburetor has been converted to LP gasoperation.

– The engine compartment accommodates anadditional gas regulator required to adjust theair/fuel mixture for the engine.

– The mechanical choke has been converted toelectrical control; it acts upon the gas regula-tor.

Engine 1250 DWith the exception of the different engine type,the unit is identical to the basic KMR 1250 Bversion.

– Single-cylinder, air-cooled diesel engine (YAN-MAR L 70 AE-DE) w/ electric starter.

– Features compression release for short-termoperation to help overcome top dead centerwhen starting the engine.

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View from front

1 Gas cylinder (LP Gas)2 Steering wheel3 Driver seat4 Lifting mechanism for debris container5 Rear wheel, chain-driven6 Fuel tank for KMR B / D7 Engine KMR B / LPG / D8 LH side brush (option)9 Front wheel10 Head lights11 RH side brush12 Controls (see page 7)

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1 Lever dust pickup, Close / Open2 Button clean dust filter (S2)3 Button lower debris container (S6)*4 Button raise debris container (S8)*5 Button tilt debris container (S7)*6 Lever parking brake7 Lever coarse-dirt flap8 Headlight switch (S4)9 Operating hours counter10 Button two-hand operation, hydraulic (S5)11 Lever LH side brush, Raise / Lower

(option)

12 Lever brush roller, Raise / Lower(suspension: rigid or floating)

13 Lever RH side brush, Raise / Lower14 Throttle lever15 Button horn (S10)16 Ignition switch (S1)17 Choke18 Drive pedal ORIGINAL and REVISED

* Function available only in conjunctionwith two-hand operation button (10).

( ) See circuit diagram.

Controls

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Unit Functions KMR 1250 B

Gasoline Engine (HONDA GX 270)

1 Stop screw, throttle valve2 Idle jet3 Bypass4 Throttle valve5 Idle orifice6 Idle jet bore and idle air channel7 Carburetor throat (venturi)8 Idle air inlet9 Choke valve10 Main air jet11 Idle system

12 Emulsion tube13 Air orifice14 Float chamber15 Main jet16 Adjusting screw, idle mixture17 Fuel inlet18 Inlet, float valve19 Float20 Float valve w/ float needle21 Float

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KMR 1250 B Unit Functions

Gasoline Engine (HONDA GX 270)

Float systemWhen float chamber (14) is empty, fuel passesfrom fuel tank into float chamber (14) via the floatvalve inlet (18). The rising fuel level causes thefloat (21) to be raised.The inflow of fuel is interrupted when the float(21) causes the float valve to close. Drawing fuelfor engine operation from the float chamber (14)causes the float (21) to be lowered, which in turnopens the float valve (18).This cyclical procedure ensures a constant levelof fuel inside the float chamber (14).

Float chamber equalizationOn the carburetor side, the airspace inside thefloat housing is connected with the outside at-mosphere by means of a channel. This facili-tates the equalization of the pressure equilibri-um inside the float chamber as the fuel level ris-es or falls.

Idling operationWhen the engine is idling, the throttle valve (4) isfully closed.– This causes negative pressure to occur be-

tween the throttle (4) and the crown of theengine piston, with the latter moving towardbottom dead center while the intake valve isopen.

– The atmospheric pressure inside the floatchamber (14) then causes fuel to be con-veyed through the main jet (15) and idle jet(2).

– The idle jet (2) controls the flow of fuel throughthe idle bypass channel (3). The fuel thenblends with the air being drawn in throughthe idle air channel (6).

– The resulting air/fuel mixture then flows intothe engine.

– The idle mixture adjusting screw (16) con-trols the volume of air/fuel mixture that is al-lowed to flow through the idle orifice (5).

Partial load operationEngine speed rises when the throttle valve (4)opens, and the volume of the air/fuel mixturebeing drawn through the idle jet (2) increases.

Full load operationIn full load operation, the throttle is wide (4) open:– Air flows through the carburetor throat, or

venturi (7). Because the diameter of the ven-turi outlet is smaller than that of the intake,the air is accelerated as it passes through.This increased flow velocity causes nega-tive pressure to occur at the outlet side of themain jet (15).

– Pressure inside the float chamber (14) isequalized via an atmospheric relief channel.Because atmospheric pressure is higher thanthe pressure in the carburetor throat (7), fuelis transported from the float chamber (14),and pressed through the main jet (15) intothe emulsion tube (12).

– The air flowing through the main air jet (10)is blended with the fuel that is flowing throughthe orifices of the emulsion tube (12).

– This mixture is then drawn into the carbure-tor throat (7), where it is enriched with moreair before passing into the engine.

Choke system functionThe choke valve (9) should be closed only whenstarting a cold engine. This causes the followingto happen:– The closed choke valve (9) allows less air to

be drawn into the carburetor throat (7).– However, the fuel volume being drawn in

through the main jet (15) remains the same.– This causes the fuel component in the air/

fuel mixture to rise, with the richer mixtureproviding easier engine starting.

Note:For information on other maintenance andadjustments of the engine, refer to the Serv-ice manual „4-Stroke Internal CombustionEngines“ (5.905-122).

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1 Valve guard2 LP gas line3 Cylinder shutoff valve4 Outlet tube5 LP gas cylinder6 Sun shield7 LP gas in gaseous state8 LP gas in liquid state9 Carburetor

10 Engine11 Vacuum line12 LP gas line13 Gas filter14 Solenoid valve, gas supply15 Mixture control screw (MIN eng. speed)16 Gas regulator17 Choke lifting solenoid18 Mixture control screw (MAX eng. speed)

LP Gas Engine (HONDA GX 270)

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– The presence of frost on any part of the LP gassystem indicates a possible leak. Close thecylinder shutoff valve (3) immediately. Applysuitable leak detection medium (soapy wateror Leak Detecting Spray 6.282-033) to gaslines, solenoid valve, gas regulator and gashose to carburetor. Open cylinder shutoff valve(3), and check for formation of bubbles. Theunit may be returned to service only after thor-ough repairs have been carried out by ap-proved specialists.

Note:The LP gas system of the unit must be in-spected by a licensed expert in 6-monthintervals. The results of each inspection mustbe made available in the form of a test cer-tificate.

– An expert is deemed to be a person who, basedon his professional education and skills, pos-sesses sufficient knowledge of, and expertisein, the field of LP gas systems, and who issufficiently familiar with applicable workingdirectives and accident prevention regulations,as well as commonly accepted procedures ofthis technology, all of the above enabling himto evaluate, determine and assess the safeoperational state of LP gas systems.

Gas system

– Opening the shutoff valve (3) on the LP gascylinder (5) causes gas to flow through the gasfilter (13). At this point, possible contaminantsare trapped in a paper filter, and metallic par-ticles from gas cylinder are removed by meansof a small magnet.

– Setting ignition key to Pos. 1 (ON) opens so-lenoid valve (14), allowing LP gas to flow fromgas filter (13) into primary chamber of gas reg-ulator (16). Here, a spring-loaded valve reduc-es gas pressure to approximately 150 mbar(2.2 psi).

– When starter begins to crank engine (10), avacuum is created in the suction channel.Through vacuum line (11), this vacuum actson low-pressure diaphragm in secondary stageof gas regulator. Diaphragm opens low-pres-sure valve, and gas can be drawn into engine.

– Pressing choke button causes choke liftingsolenoid (17) to open low-pressure valve, al-lowing gas to flow directly through carburetorand into engine. This function is particularlyimportant in cold-starting situations. To pre-vent high-level enrichment of intake mixturewith LP gas, choke button should not bepressed for longer than 3-5 seconds.

Note:The connection on cylinder shutoff valve (3)must face straight up (extraction of LP gasin gaseous state).

LP Gas Engine (HONDA GX 270)

Carburetor in LP gas operation (example)

1 Gas inlet2 Air intake3 Air/fuel mixture outlet4 Mixing chamber5 Gas jet

Gas regulator

– Engines using LP gas as a fuel are equippedwith a gas regulator which feeds LP gas to thecarburetor of a gasoline engine. The carbure-tor generates an air/fuel mixture which is drawninto the combustion chamber for ignition.

Note:For information on other maintanance andadjustments of the engine, refer to the Serv-ice manual “4-Stroke Internal CombustionEngines” (5.905-122).

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Diesel Engine (YANMAR L 70 AE-DE)

1 Drive shaft2 Housing, engine3 Piston4 Cylinder head5 Injector6 Fuel feed line7 Fuel line from fuel tank8 Injection pump9 Shim10 Housing, injection pump11 Cam shaft

Injection systemThe injection pump (8) delivers fuel to the injec-tor nozzle (5) via fuel line (6). The fuel, is theninjected into the combustion chamber above theengine piston (3), where the extreme enginecompression causes the fuel to self-ignite.

Note:For information on other maintenance andadjustments of the engine, refer to the Serv-ice manual „4-Stroke Internal CombustionEngines“ (5.905-122).

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Diesel Engine (YANMAR L 70 AE-DE)

Injection pump (cross-section)

Injection pumpThe injection cam on the camshaft shuttles theinjection pump piston (1) back and forth. Fuel isconveyed to the injection nozzle via pressurevalve (7).Injection timing is determined by the thicknessand number of shims (2) in shim pack.

Note:Checking injection timing and related fineadjustment are the exclusive domain of alicensed service facility.

In the event that the injection pump fails to deliv-er fuel, the entire injection pump assembly mustbe removed and checked.

Note:Injection pump service and repair are theexclusive domain of a licensed service facil-ity.

Injector assemblyThe fuel that is conveyed to the injector by theinjection pump is transported through the feedchannel (14), past the nozzle valve (13), and thensprayed into the engine combustion chamber.

Injector assembly (cross-section)

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1 Pump piston2 Shim pack3 Flange4 Fuel inlet5 Pressure valve holder6 Valve spring7 Pressure valve8 Housing, injection pump9 Piston spring10 Holder, piston spring11 Housing, injector12 Valve spring13 Nozzle valve14 Fuel feed line

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Steering and Drive Power

1 RH drive chain2 Impeller fan3 Drive belt, impeller fan4 Drive belt, hydrostatic transmission5 Hydrostatic transmission6 LH drive chain7 Brush roller8 Drive belt, brush roller9 Drive belt, LH side brush

(option)10 LH side brush (option)11 Chain, steering12 RH side brush13 Drive belt, brush roller14 Drive belt, RH side brush15 Steering wheelM Engine

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1 Hydraulic unit2 Engine B / LPG / D3 Steering wheel4 Operator seat5 Debris container, raised6 Impeller fan7 Dust filter

Sweeping system

8 Rear wheel9 Debris container, lowered10 Hydrostatic transmission11 Brush roller12 Coarse-dirt flap13 Front wheel14 Side brush

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Troubleshooting Information KMR 1250 B, LPG, D

Check fuse F1/F2Fuse F2 protects the entire control voltage cir-cuitry. This fuse is located on the A1 circuit board.– Check fuse and replace as required.

A1 Circuit boardF1 Fuse, motor filter cleaning (10 A)F2 Fuse, control voltage (7,5 A)

Check battery voltage– Check battery voltage with voltmeter.– Check electrolyte level on low-maintenance

battery.– If required, recharge battery using external

battery charger (e.g., P/N 6.654-046).

Fuses F1/F2 on A1 circuit board

Fuse F4 in electrical box

Checking ignition switch S1 while removed from unit

Check fuse F4 and wiringWhen the engine is running, the battery receivesa steady charge current from the alternator.The fuse F4 (15 A rating) protects this circuit.The fuse is located beneath the electrical box.– Check fuse and replace as required.– Check all wiring and connections between

alternator and battery.

Check ignition switch S1– Remove screws on instrument panel (2), and

carefully lift off instrument panel.– Check ignition switch (1) for continuity at its

various positions (0, 1, 2).

Key position Connection Function0 30/1 - 15 Engine Stop1 30 - 15/54 In operation2 30 - 50 Starter

Starter Fails to Turn Engine

A1

F1(10A)

F2(7,5A)

F4(15A)

F4 Fuse, generator

1 Ignition switch (S1)2 Screws, instrument panel3 Ignition switch, bottom view

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KMR 1250 B, LPG, D Troubleshooting Information

Check voltage on starter solenoid– Hold ignition switch in position II.– Measure the voltage between solenoid ter-

minal and vehicle ground.– If the meter fails to indicate a voltage, wiring

must be checked for possible defect.– If a voltage is present but starter fails to turn,

starter is defective and must be replaced.

Note:The connecting wiring for the starter sole-noid are not shown in electrical diagram.

Checking voltage on starter motor M1

Checking voltage on starter solenoid

Check starter M1– Hold ignition switch in position II.– If a voltage is present but starter fails to turn,

starter is defective and must be replaced.


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Check regulator ORIGINAL

When the engine is running, the alternator gener-ates a continuous current flow. The regulatorautomatically adapts this current as required(depending on battery charge status and electri-cal load).– Start engine and allow to run.– Using a clip-on ammeter, measure regulator

charging current on X1 plug coupling (whitewire on male connector or red wire on femalecoupling of X1 connector).

If a charging current cannot be measured, thisindicates that the alternator is faulty and must bereplaced.

Checking regulator charging current


Checking regulator charging current

Check regulator REVISED

Units of recent manufacture no longer featurethe X1 plug coupling. Wires are connected byindividual round plug couplings instead.– Start engine and allow to run.– Using a clip-on ammeter, measure regulator

charging current on red-and-white wire cou-pling.

If a charging current cannot be measured, thisindicates that the alternator is faulty and must bereplaced.

ws White wirert Red wire1 Plug coupling2 Round male plug w/ female coupling

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Checking S3 seat contact switch

Note:Actuating the starter without a load on theseat will crank the engine but not start it!

– Disconnect wire connections from seat con-tact switch.

– Connect an ohmmeter to check seat contactswitch for continuity.

– With a physical load on the seat cushion, theswitch opens, and there is no continuity.

– In the absence of a physical load on the seatcushion, switch contacts are closed.

– Adjust or replace seat contact switch as re-quired.

Checking spark plug (gasoline & LPG engine)

Checking seat contact switch S3

Check spark plug(gasoline and LPG engine)– If ceramic insulator shows signs of break-

age of cracking, spark plug must be replaced.– Heavily fouled spark plugs must be replaced.– Using a feeler gauge, measure electrode gap,

and bend electrodes to adjust as required.– To compress captive seal washer on new

spark plug, screw in plug hand-tight, thentighten 1/2 turn. Tighten used spark plugsonly by 1/8 to 1/4 turn.

Check oil level switch S9(gasoline and LPG engine)In the event that the engine oil level drops downtoo far, the oil level switch cuts out the ignition.This causes the engine to stall and will preventengine restarts.– Remove the terminal of the yellow wire.– Using the ohmmeter, check the connecting

terminal for continuity.– If the oil level is sufficiently high, there will be

no continuity.– If the oil level is too low, there must be con-

tinuity.– Top up engine oil or replace oil level switch

as required.

Checking oil level switch S9 (gasoline & LPGengine)

Starter Turns Engine but Engine Fails to Start

- S3

0,70 - 0,80 mm0.028 - 0.031 in.

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Starter Turns Engine but Engine Fails to Start

Check compression release lever (dieselengine)– Engine is equipped with compression release

lever. During engine starting, it can be actu-ated for a short while to ease overcomingengine resistance at top dead center.

Note:To enable engine to start with hood open,seat contact switch must be jumpered.Jumper must again be removed once en-gine has started.

Fuel filter (diesel engine only)

Compression release lever (diesel engine)

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Using Diesel fuel (diesel engine)Exceptionally low outdoor temperatures maycause diesel fuel to congeal. In this condition,fuel is no longer supplied to the engine.– To prevent this condition occurring, add vis-

cosity agents (winterized diesel fuel or dena-tured alcohol) to the tank before cold weath-er sets in.

– If the fuel congeals, replace fuel tank contentwith winterized diesel fuel or add viscosityagents.

– Continue by allowing the power sweeper towarm up in a cold environment, with engineidling.

1 Oil filler neck2 Lever, compression release3 Injector line4 Injector5 Tank filler cap6 Seal ring7 Fuel filter

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Check freewheeling functionThe transmission features a freewheeling leverwhich can be used to engage or disengage thedrive power.Starting with S/N 10121, this freewheeling leveris permanently mounted on the transmission link-age. It is held in place in the engaged position bya stop bracket.Even with the drive engaged, the unit may beslowly pushed by hand. However, the drive mustbe disengaged (clockwise rotation) if the unit isto be moved over extended distances.– Position 1: Transmission engaged– Position 2: Transmission disengaged

Note:It is important to prevent inadvertent disen-gagement of the freewheeling lever. Other-wise, no drive power can be applied, andengine braking will be ineffective.

Freewheeling lever on transmission

Engine Runs but Machine Fails to Move

Transmission drive beltThe transmission drive belt tension is adjustedby means of the tension roller. The drive beltmust be sufficiently tight so that it will not wowthrough more than 3 to 8 mm (0.12-0.32 in) whenapplying a force of 2 kg ( 20 N) to the center of thelongest span.Replace drive belt as required, ensuring that ten-sion roller has first been relaxed.

Transmission drive belt with tension roller

1 2ON OFF

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Checking drive pedal ORIGINAL

A linkage connects the drive pedal to the shiftlever (2) on the transmission (7). When the drivepedal is not actuated, the shaft-mounted legspring (6) always returns this lever to the centerposition .When at the center position, the drive pedal ad-justment should provide for equal angles fromthe horizontal for both forward and return foot-rests.An adjusting screw (8) beneath the drive pedallimits pedal travel and, at the same time, the max.drive speed (see technical specifications).

Note:This limit must be observed especially in thecase of units licensed for road travel.

It is essential that the shaft-mounted leg spring(6) securely rests against the dog pin (4) andstop pin (5), and that it does not slip past thesetwo limiters (check intermediate plate (3)).With the drive pedal at center position and withthe parking brake released, the unit may moveneither forward nor backward.The drive pedal must travel without jerking orbinding.

Note:All adjusting screws must be fixed with seal-ing lacquer.

Adjusting drive pedal

Shift lever on transmission


1 Drive pedal linkage2 Shift lever3 Intermediate plate4 Dog pin in shift lever5 Stop pin in transmission6 Shaft-mounted leg spring7 Transmission8 Adjusting screw

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Shift lever on transmission

Adjusting drive pedals

Checking drive pedal REVISED

A linkage connects the drive pedals to the shiftlever (4) on the transmission (1). When the drivepedals are not actuated, the pull spring (3) al-ways returns this lever to the center position.When at the center position, the drive pedalsshould be adjusted so that the forward and re-verse pedals at equal angles from the horizontal.Two adjusting screws (5 and 6) beneath the drivepedals limit pedal travel and, at the same time,determine the max. drive speed (see technicalspecifications).

Note:These limits must be observed especially inthe case of units licensed for road travel.

With the drive pedals at center position and withthe parking brake released, the unit may moveneither forward nor backward.The drive pedal must travel without jerking orbinding.

Note:All adjusting screws must be fixed with seal-ing lacquer.

1 Transmission2 Drive pedal linkage3 Pull spring4 Shift lever5 Adjusting screw, FWD drive6 Adjusting screw, REV drive

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Adjust hydrostatic transmissionStarting with serial no. 11482 to serial no. 11882,the hydrostatic transmission (1) is installed in aslanted position. As the slant is not adjustable,engine and transmission drive belts may fail aftera short while.Starting with serial no. 11883, it is possible toadjust the incline of the hydrostatic transmission.To this end, the holding bracket (3) was providedwith an elongated hole.– Loosen adjusting bolt (2).– Position hydrostatic transmission so that drive

belts run straight in belt pulleys.– Securely tighten adjusting bolt and seal with

safety paint (2).

Note:Retrofitting kit 2.882-530 is available for unitswith serial no’s. 11482 through 11883. (Re-

Adjusting hydrostatic transmission

fer to service bulletin no. 2001-042)

1 Hydrostatic transmission2 Bolt w/ stop nut3 Holding bracket, hydrostatic transmission

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Insert hydrostatic transmission

Note:Starting with serial no. 10 053, the transmis-sion is slanted forward, putting less strainon the drive belt.

Check and observe parking brake effectivenessand belt tension when a new transmission is in-stalled.

Note:The KMR 1250 is fitted with three differenttransmission shafts.

Owing to their different properties and physi-cal construction, these transmissions arenot interchangeable.

Part no. Serial no. Features6.454-074 thru 10336 1 pedal6.454-088 10337 thru 11481 2 pedals6.454-116 11482 and up slanted

installation

Transmission, thru S/N 10366

Transmission, S/N 10337 thru 11481

Transmission, serial no. 11482 and up


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Note:For operating and maintenance instructions,consult the Operator Manual for this engine.

Check engine oil level– Engine oil level must be between the MIN

and MAX markings on the dipstick.

Top up engine oil– The dipstick hole is used to add new oil to the

engine. For oil type and required volume,check unit “Specifications”.

Change engine oil– Place a suitable catch tray beside the unit.– While holding oil drain hose in catch tray,

remove oil plug and allow engine oil to drain.– Securely replace oil drain plug.– Fill engine with new oil. For oil type and re-

quired volume, refer to “Specifications”.

Note:Ensure environmentally safe disposal ofused engine oil.

Clean air filter elementWhen filter element is dirty, replace the paperfilter element (2). To clean filter element, blowthrough with compressed air from the inside out,or firmly tap on hard surface to dislodge caked-on dust. Do not brush off because this wouldpress dust particles into paper fibers.Wash foam ring (2) with a mild solution of house-hold detergent. Rinse thoroughly and allow to dry.Immerse foam insert in clean engine oil, andsqueeze to remove excess oil. If too much oil isallowed to remain in foam insert the engine willsmoke while running.

Oil dipstick

Draining engine oil

Air cleaner w/ foam insert and paper element

Maintenance Procedures (gasoline and LPG engine)

1 Foam ring2 Paper element

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Carburetor w/ fuel cock and sediment bowl

Operating RPM adjustmentThe engine operating speed (refer to „Specifica-tions“) is set by means of the adjustment screw(1). Once the setting is correct, the screw mustbe fixed with sealing lacquer.

Adjusting engine operating speed

Maintenance Procedures (gasoline and LPG engine)

Clean sediment bowl– Set fuel cock (2) to OFF position.– Remove sedimentation cup (3) complete with

O-ring, and wash out with nonflammablecleaner or inert cleaning solvent. Allow to drythoroughly, then install and tighten securely.

– Set fuel cock (2) again to OPEN position.Check for possible leaks around sedimenta-tion cup.

Note:Ensure that no spilled fuel remains in areaaround carburetor before starting engine.When engine has started, check sedimen-tation cup for leaks.

1 Adjusting screw, engine operating RPM2 Fuel cock3 Sedimentation cup

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3

28

Troubleshooting Information KMR 1250 LPG

Maintenance Procedures (LPG engine)

Set CO value (LPG engine)To adjust CO value, the following measuring de-vices will be needed:– Tachometer, P/N 6.491-361– Exhaust analyser. Procure suitable CO an-

alyser locally; requires measuring range upto 2% CO.

Removing muffler guard

Setting CO value w/ mixture control screw (idlespeed)

Measuring CO value inside muffler tailpipe

1. Set CO value at idle speed– Start engine, and set accelerator lever on

instrument panel to MIN position. Idle speedshould be between 1250 and 1550 RPM (seealso “technical specifications”).

– Let engine warm up for a few minutes.– Using a floor jack, raise front of unit, and

remove muffler guard (1). There is no otherway to access the muffler outlet.

– Measure CO value inside muffler tailpipe (2).– Using the mixture control screw idle speed)

(5), set CO value on gas regulator (4) (nom-inal CO value is 0.5% ).

– With the correct adjustment, engine must runsmoothly and quietly, and provide reliablestarting.

– With adjustment completed, fix mixture con-trol screw (5) by applying sealing lacquer.

1 Muffler guard2 Muffler3 Solenoid valve

4 Gas regulator5 Mixture control screw (idle speed)

1

2

3

4

5

29

KMR 1250 LPG Troubleshooting Information

Maintenance Procedures (LPG engine)

2. Set CO value at operating speed– Set accelerator lever on instrument panel to

MAX position (operating speed).– Measure operating RPM and adjust via stop

screw (6) on carburetor as required. Operat-ing speed has to be between 2600 and 2700RPM (see also “technical specifications”).

– With adjustment completed, fix carburetorstop screw (6) by applying sealing lacquer.

– Check CO value inside muffler tailpipe.

Adjusting operating speed

Setting CO value w/ mixture stop screw (oper.speed)

– Using the mixture control screw (idle speed)(7) (operating speed), set CO value on gasregulator (4) (nominal CO value is 0.5%) .

– With the correct adjustment, engine must runsmoothly and quietly, and provide reliablestarting.

– With adjustment completed, fix mixture con-trol screw (7) by applying sealing lacquer.

3 Solenoid valve4 Gas regulator5 Mixture control screw (idle speed)6 Carburetor stop screw7 Mixture control screw (operating speed)

6

7

3

4

5

30

Störungshilfe KMR 1250 D

Note:For operating and maintenance instructions,consult the Operator Manual for this engine.

Check engine oil level– Engine oil level must be between the MIN and

MAX markings on the dipstick.

Top up engine oil– The dipstick hole is used to add new oil to the

engine. For oil type and required volume, referto “Specifications”.

Change engine oil– Place a suitable catch tray beside the unit.– While holding oil drain hose in catch tray,

remove oil plug and allow engine oil to drain.– Securely replace oil drain plug.

Note:Ensure environmentally safe disposal ofused engine oil.

– Fill engine with new oil. For oil type and re-quired volume, refer to “Specifications”.

Check air filter elementWhen filter element is dirty, replace the paperfilter element. To clean filter element, blow throughwith compressed air from the inside out, or firmlytap on hard surface to dislodge caked-on dust.Do not brush off because this would pressdust particles into paper fibers.

Oil dipstick, diesel engine

Maintenance Procedures (diesel engine)

Draining engine oil, diesel engine

Air cleaner w/ paper element, diesel engine

31

KMR 1250 D Störungshilfe

Maintenance Procedures (diesel engine)

Governor adjusting screw, diesel engine

Checking fuel solenoid valve, diesel engine

Adjusting engine operating speed, diesel engine

1 2

256

3

4

406

PeakHold

406A1006A606V

406V

kHz

987

10

11

1 Adjusting screw, operating speed2 Throttle control cable3 Governor lever4 Adjusting screw, governor5 Governor spring6 Governor spring7 Injector line8 Fuel solenoid valve9 Connecting wire10 Clip-on ammeter (Multimeter)11 Magnetic field tester

Operating RPM adjustmentEngine operating speed (refer to “technical spec-ifications”) is set by means of the adjusting screw(1).With adjustments completed, the screw must befixed by applying sealing lacquer.

Governor adjusting screw

CAUTIONGovernor spring (6) must be hookedinto hole on governor lever (3) exactlyas shown.

Adjusting screw (4) must be fixed withsealing lacquer. Screw may not betampered with as this would changethe entire engine setup.

Check fuel solenoid valveUpon engine shutdown at the ignition switch, thefuel solenoid valve (8) shuts off fuel supply throughthe injector line (7).If the engine fails to shut off:– Check connecting wire (9) for secure con-

nection.– Use magnetic field tester (11) to determine if

a magnetic field is generated upon actuatingthe ignition switch (confirmation by beep toneon magnetic field tester).

OR– Use Clip-on ammeter (10) to determine

switching on/off at ignition switch will causea current at connecting wire (9).

In the absence of a current flow, the fuel solenoidvalve (8) is defective and must be replaced.

32


Adjust parking brake

Note:With the parking brake released, there mustbe NO braking effect, and the wire and cas-ing cable (1) must be fully relaxed.

The parking brake is required to securely holdthe unit in place when applied on a grade of 25%,and with the unit loaded to capacity.At the same time, tension (X) of the pull spring (7)may not extend by more than 5 to 10 mm (0.20-0.40 in).Brake adjustment is accomplished with adjust-ing nut (5).

- Starting with serial no. 10600, a pullspring is installed on the operating lever(9). This ensures a more easy movementof the brake when the operating lever (9)is actuated.

Adjusting parking brake

Adjusting parking brake

Parking brake w/ pull spring

Parking Brake – No Function

1 Wire and casing cable2 Brake caliper3 Brake piston4 Brake pulley5 Adjusting nut6 Brake lever7 Pull spring8 Pull spring9 Operating lever, parking brake10 Pull spring

X

2

3

54 6

1

7

X

1

2

3

54 6 7 8

1

9

10

10

33


Check tire pressureUneven tire pressure in the rear wheels causesthe power sweeper to tilt sideways and run lop-sided. The result may be a substandard sweep-ing pattern and the cleaning result is not satisfy-ing.

Check control cablesThe combination of excessive strains at deflec-tion pulleys and repeated road soiling exert con-siderable stresses on mechanical control cables.If required, check cable routing, clean cables,and lubricate with new grease (P/N 6.288-107).

Replace brush roller– Stop and park the machine, engage parking

break.– Using the operating lever, lower brush roller

to center position.– Swing RH side hatch (3) upward.– Remove safety bolt (2) at lower end of fork

head (A, B), and pivot rod toward the rear.– Turn knurled screw (3) counterclockwise.– Remove brush roller arm (4).– Open turn-lock latch (5), and swing hinged

brush roller hatch toward front of unit.– Extract brush roller (6).– Turn brush roller adjustment screw clock-

wise until seated.– Install new brush roller, then replace brush

roller arm.

Note:Ground clearance of raised brush roller mustbe at least 10 mm (0.40 in).

Brush roller, installed position. Arrow points FWD.

Extracting brush roller

Removing brush roller arm

Brush Roller – Poor Performance

A

B

5

2

3

1

4

346

5

1

1 Side hatch2 Safety bolt3 Knurled screw4 Brush roller arm5 Turn-lock latch for hinged brush roller

hatch6 Brush roller

34


Check sweeping pattern– Close dust pickup hatch.– Drive mobile sweeper onto dusty surface,

and set parking brake.– Lower brush roller (lever in center position),

and allow to run in place for a few seconds.– Raise brush roller and, with coarse debris

hatch open, reverse a few feet.

Note:Sweeping pattern width should be between30 and 50 mm (1.18-1.97 in). Parallel devia-tion should be less than 15 mm (0.60 in).

Modify sweeping patternThe sweeping pattern is modified by means ofthe central adjustment screw:– To increase pattern contact area: Turn out

adjusting screw counterclockwise (+).– To increase pattern contact area: Turn in

adjustment screw clockwise (–).

Setting sweeping pattern

Modifying sweeping pattern

Set correct sweeping patternA wedge-shaped sweeping pattern may be setby adjusting brush roller suspension on the forkhead (1). This may be accomplished by manip-ulating the fork head on either left-hand or right-hand side, or on both sides.

Brush Roller – Poor Performance

-+

30-50 mm

1

Checking sweeping pattern

1 Fork head

35


Check / replace Brush rollerIn the event that wrap-around string or bandedmaterials block the brush roller, the latter mustbe deinstalled and obstructions removed. Adjustdrive belt tension rollers to allow approx. 10 mmdepression of the respective drive belts.

Check / replace brush roller drive belt (4)This drive belt (4) is located on the vehicle left inthe brush well.If required, replace drive belt after relaxing ten-sion roller (2).

Checking brush roller drive belt

Checking drive belts for sweeper

Removing intermediate shaft

Brush Roller – No Rotation

1 2 3 54

10

8 9

M6

7

12

3 4

1

11

6

Check / replace sweeping drive belt (6)This drive belt (6) is located on the smaller sheaveof the belt pulley (7).- Loosen tension roller (2), remove drive belt

(4) and brush roller arm (3).- Loosen tension rollers (8) and (10), remove

drive belt (9). Disconnect the drive belt (6)from the belt pulley (7).

- Remove drive belt (11).- Loosen intermediate shaft at the flange

mounting (11). The drive belt (6) can now beremoved.

- Place new drive belt (6) on intermediate shaft(12), and on the smaller of the two sheaveson pulley (7).

- Reinstall all previously removed componentsin reversed sequence, then tighten drive belts.

1 Belt pulley, intermediate shaft2 Tension roller, main roller drive3 Brush roller arm4 Drive belt, brush roller5 Belt pulley, brush roller6 Drive belt, sweeping drive7 Belt pulley, engine8 Tension roller, hydrostatic transmission9 Drive belt, hydrostatic transmission10 Tension roller, sweeping drive belt11 Flange mounting12 Intermediate shaftM Driving engine

36


Check drive belt side brushThe side brush is driven by elastic drive belt (5)via intermediate shaft (6).Belt replacement necessitates deinstallation ofintermediate shaft (6) (see page 35, pos. 12).

Check control cable side brushThe control cable (3) is subjected to considera-ble strain through exposure to road soiling. Ifrequired, check cable routing via deflection pul-ley (2) for ease of movement. Clean and lubri-cate with new grease, P/N 6.288-107.

Replace side brushThe side brush is attached to the underside ofthe transmission by means of three bolts.

Side brush drive belt (shown at right)

Checking sweeping patterns

Sweeping pattern – Check / adjust– Sprinkle a level surface evenly with fine sand.

Drive machine onto this surface, and setparking brake.

– Lower side brush, and allow to run for ap-prox. 15 to 30 seconds. Continue by raisingside brush, backing sweeper off test surface.

– The bottom position of the side brush is ad-justed by means of the stop screw (7). Thesweeping pattern should be shaped like ahalf-moon sickle.

– The top position of the side brush is adjustedby manipulating the control cable adjustment(4). Ground clearance of raised side brushmust be approx. 10 to 15 mm (0.40-0.60 in).

Note:The side brush must be easily moved downand up by means of the control lever. Whenoperating, it extends approx. 15 cm (5.9 in)beyond the machine footprint, with exten-sion radius limited by a chain (1).

1 Chain2 Deflection pulley3 Control cable4 Control cable adjustment, ground clear-

ance5 Drive belt6 Intermediate shaft7 Stop screw, contact pressure8 Side brush

Adjusting LH and RH side brushes

Side Brushes – Poor Sweeping Performance

65431

78

2

L R3 4 3 255 4 4

37


Replace dust filterA noticeable deposit of dust at the impeller fanexhaust indicates a poorly installed or defectivedust filter.– Raise debris container (1) to half of its travel,

and secure against dropping.– Unsnap clip fasteners (2) on filter enclosure.– Swing filter enclosure (3) forward, then lift

off.– Unfold hand grip (4), pull out, and unlock by

means of a 90-degree turn.– Remove old dust filter (5).– Insert new dust filter (6).– Return hand grip (4) to original position, and

snap into place.– Install filter enclosure (3), and lock clip fas-

teners (2).

Check rubber sleeveTo prevent filter replacement problems causedby premature corrosion of the locator pin (7) inthe filter receptacle, a rubber sleeve (9) was in-stalled on units with S/N 10518 and up.Defective or missing rubber sleeve (9) should bereplaced or retrofitted (refer to service bulletinno. 1998-045).

Lifting filter box

Replacing dust filter

Installing rubber sleeve

Excessive Unit Dusting

1

2

2

3

4

5 / 6

1 Debris container2 Filter enclosure clip fasteners3 Filter enclosure4 Hand grip5/6 Replace dust filter7 Locator pin8 Compression spring9 Rubber sleeve

2

1

3

38


Coarse debris flap in open position

Sealing shaker motor flange

Check filter receptacleA noticeable accumulation of dust in the enginecompartment indicates a leaky filter receptacle.The seal ring (1) is defective or the three open-ings on flange (2) are too large, and protrudebeyond the welded ring (3).– Pull off seal ring (1), check and replace as

required.– To seal the openings, apply silicon sealer

around the entire circumference outside thewelded ring (3).

– Replace seal ring (1), ensure proper seat-ing.


1

2

3

7 58 6 4

1 Seal ring2 Flange assembly3 Welded ring (mating rim for seal ring)4 Retainer, control cable5 Coarse debris flap6 Adjusting screw, coarse debris flap7 Control cable5 Sheet metal guard

Check coarse debris flapWhen the coarse dirt flap is open, the brush rollerflings the dirt and dust away toward the frontwithout sweeping it up.The coarse debris flap (5) must open and shuteasily. If required, clean the control cable (7),and lubricate with new grease (P/N 6.288-107)or spray in with teflon spray (P/N 6.288-125).When opened, the gap of the coarse debris flap(5) should be at least 40 mm (1.58 in) wide. In itslowered state, it should trail by approx. 10 to 20mm (0.40-0.80 in).The coarse debris flap (5) is adjusted with theadjusting screw (6).

Note:If the coarse debris flap trails excessively, itmay get caught in the brush roller.

When replacing the control cable (7), care mustbe taken that the retainer (4) remains in the orig-inal horizontal position. This prevents the coarsedebris flap from being pulled inward again aftera short while, breaking the control cable as aresult.To straighten out the retainer (4) or to access theadjusting screw (6), the sheet metal guard (8)must be removed.

39


Check dust pickup– When sweeping on dry ground, the hatch (4)

will be opened with the lever (8) to allow airto enter the impeller fan.

– When sweeping on moist or wet ground, thehatch must be closed again to prevent mois-ture from entering the dust filter.

– When the sweeping debris container israised, it also automatically closes the hatch(4). This prevents dust or objects to be drawninto the large open intake opening (7) in thisstate.

The right-hand side panel conceals a forked,spring-loaded lever (6). When lowered almost tothe bottom position, the container presses thelever forward. This causes the container to belocked up in its end position so that it cannotswing out inadvertently during travel in moun-tainous terrain.The control cable (3) for the hatch (4) is attachedto the lever (6). Pressing the lever backward whileraising the debris container closes the hatch.Pressing the lever forward while lowering thedebris container causes the hatch (4) again to beopened by the coil spring (5).

Note:When the lever is set to the “SUN” position(8), the hatch (4) must be fully open.

The lever (4) operating the hatch must traveleasily enough to allow it to be opened by thecoil spring (5) without problems.

Dust pickup hatch

Container locking lever

Lever, dust pickup close / open


1

2

35

4

7 3

3

6

6

8

1 Housing, impeller fan2 Control cable connected from lever (8) on

instrument panel to hatch (4)3 Control cable connected from lever (6) to

hatch (4)4 Hatch5 Coil spring6 Debris container locking lever7 Intake opening8 Lever, dust pickup close / open

40


Check seal on filter housingUp until S/N 10033, the seal was applied to theimpeller fan inlet. Later, in an effort to improveseal effectiveness, it was attached to the filterhousing.With the filter housing lowered, the seal mustreliably seal off the transition to the housing.

Seal on filter housing

Seals on brush well (rear view with raised container)

Checking tire pressure

Check seals on brush wellThe three seals shown at left serve to seal off thebrush roller well from the debris container.The seals must be replaced as required.

Check impeller fan drive beltThe drive belt (see page 14 pos. 3) is elastic andcannot be adjusted.Replace belt as required.


KARCHER

Check tire pressureA too low tire pressure causes a sinking of thesealing lips and sealing strips and thus a worsesweeping result.(See “Specifications” for tire pressures.)

41


Adjust sealing lips / sealing strips in thesweeping areaThe sealing lips and sealing strips serve essen-tial functions. They maintain the vacuum level inthe sweeping area required for proper function-ing, ensuring dust-free sweeping operations atthe same time. Damaged or worn sealing lips /sealing strips must be replaced.– The front sealing lip (1) cannot be adjusted.

If worn, it should be replaced as soon aspossible.

– Adjust lateral sealing strips (3) to provide aground clearance of approx. 1 to 3 mm (0.04-0.12 in).

– Adjust rear sealing lip (4) with an afterrunningclearance of approx. 10 to 20 mm (0.40-0.80in).

Note:Always consider the weight of the driverwhen doing setup work.

On original units, the lateral sealing lips (3) werecut in such a way that a gap existed betweenthese and the rear sealing lip (4). It providedaccess for fine dust to be drawn into the enginecompartment and engine proper, and enter theengine. Replace older sealing lips with new lat-eral sealing lips (4). They are cut differently atthe back.

Check sealing lips at engine air intakeTogether, the sealing lip (6 and 7) on the air-channel carburetor and the seal on the air chan-nel blower provide dust-free air to be drawn intothe engine.The cross-section of the sealing lip (6 and 7) onthe air-channel carburetor was optimized. Seal-ing strip must be checked for the new cross-section and possible damage, and must be re-placed as required.The seal (8) on the air-channel carburetor mustbe checked for damage and deformation, andreplaced as required.

1 Front sealing lip2 Lateral sealing strip ORIGINAL

3 Lateral sealing strip ORIGINAL

4 Rear sealing lip5 Direction of motion6 Sealing lip ORIGINAL , air-channel carbure-

tor7 Sealing lip REVISED , air-channel carbure-

tor8 Seal, air-channel blower

Adjusting sealing lips & sealing strips

Lateral sealing lip

Sealing lips, air intake


3

2

1

5

10-20 mm

1-3

mm

14

3

5

5

2

3

42


Check terminals (X 10 / X 11) in filter hous-ingPower for the filter cleaning motor is supplied viatwo spring-loaded contact terminals (1).With the debris container lowered, spring-load-ed contact points (1) mounted on the divider bafflemust reliably make connection with rigid matingcontacts (2) on debris container, being depressedby approx. 3 to 4 mm (0.12-0.16 in) in the proc-ess.Clean contacts, adjust contact position by install-ing flat washers, or replace contacts as required.

1 Contacts on divider baffle, spring-loaded2 Contact points on debris container, rigid

Contact points filter housing

Checking M3 motor input voltage

Fuse F1 (filter cleaning motor) on A1 circuit board

Filter cleaning Motor – No Function

Check input voltage at M3 filter cleaningmotorEach time ignition switch is set to “0” position,filter cleaning motor automatically runs for ap-prox. 15 seconds. Pressing filter cleaning buttonwhile engine is running ( ignition switch in “I”position) starts 15-second filter cleaning cycle.To prevent dislodged dust from being drawn intosuction turbine, air flap must be closed before-hand.– Raise debris container.– Press filter cleaning button.– Check voltage on contact terminals X10/X11.– If there is no voltage present, start by check-

ing fuse F1 (10 A) on A1 circuit board, thencheck terminals X2/X3.

– If a voltage is present without shaker motorrunning, check motor for ohmic resistance.

1 2

A1

V

X4 X5

X2 X3X1 X6

-F1(10 A)

X11X10

-K1-F2(7,5A)

-M3

M

A1

F1(10A)

43


Note:Troubleshooting may proceed with engineshut off.

Check hydraulic unit- Check F3 fuse. The F3 fuse protects only the

hydraulic unit. It is located beneath the elec-trical box.

- Using a voltmeter, check input voltage of M2hydraulic unit between thick red cable (pos-itive polarity, 10 sq. mm cross-section) andmatching black cable (negative polarity).

- Using the voltmeter, check input voltage onmotor relay. Perform measurement with ig-nition switch set to position “I”.With buttons S5 and S8 actuated, controlvoltage must be present at relay.

If measurements removed components and produce a voltage reading but hydraulic motoris not running, the hydraulic unit is defective andmust be replaced.

Note:The wiring connections between relay andhydraulic motor are not shown in the electri-cal circuit diagram.

Check solenoid valves (Y1 / Y2)Measurements and : Using the voltmeter,check input voltage on solenoid valves Y1 andY2 at connecting plug.If voltage is present, solenoid valves will switchwith an audible click.If there is no voltage present, check power sup-ply, vehicle ground connections and both but-tons (S5 and S8) for proper functioning.The solenoid valves are not available as spareparts. If a defect is found, the entire hydraulicassembly must be replaced.

Checking voltage on hydraulic unit

Checking F3 fuse

Hydraulic Unit – No Function

F3(60A)

4

-S61

2

-S5

1

2

-Y2

-S7

1

2

4

5

-Y1

1

2

-F3(60A)

-S8

4

5

-M2

+

-

-S10

-H2

M

1 qmm(rt/bl)

(rt/bl)(rt/bl)

1 qmm(rt/bl)

0,75 qmm(br)

10 qmm

1,5 qmm(rt)

2,5 qmm(rt)

1

2

0,75 qmm(ws)

3

+

21

-

F3 Fuse, hydraulic unitM2 Hydraulic unitS5 Button, Two-Hand OperationS6 Button, Lower Debris ContainerS7 Button, Tilt Debris ContainerS8 Button, Raise Debris ContainerY1 Solenoid valve, Tilt Debris ContainerY2 Solenoid valve, Raise / Lower Container

44


Check hydraulic unitBy contamination within the hydraulic system,the debris container can no longer be raised aftera brief operating period. The fine orifices in thehydraulic unit are blocked.As the hydraulic unit is maintenance-free andshould not be opened. It must be replaced as anassembly if required.With the debris container lowered, the hydraulicfluid level should be approx. 2 to 3 cm (0.80-1.18in) below the edge of the filler neck.

Note:Extremely clean working conditions andwork habits are a prerequisite for workingon the hydraulic system.

After a replacement, all hydraulic system com-ponents automatically purge themselves whenthe raising mechanism is actuated repeatedly.As a result, only the lifting cylinder must be purgedseparately.

1 Hydraulic fluid filler neckY1 Solenoid valve, Tilt ContainerY2 Solenoid valve, Raise / Lower Container

Check hydraulic fluidWhen the unit is cold, the use of nonstandardhydraulic fluid will cause the debris container tobe raised only very slowly.The correct choice of hydraulic fluid (see “Spec-ifications”) facilitates working at temperatures to-10 °C (14 °F) without difficulty.

Hydraulic unit

Bleeding (purging) air from lifting cylinder

Debris Container – Very Slow Ascent

Purge lifting cylinder– Raise container to the top position, and sup-

port to prevent inadvertent descent.– Press Raise Container button again, while at

the same time cracking the purge screw onthe lifting cylinder. When all air has escapedand hydraulic fluid exits without bubbles, tight-en purge screw.

– Wipe up hydraulic fluid runoff, and check flu-id level in reservoir.

DANGER – FATAL INJURY HAZARDRaised container must be reliablysupported while personnel is workingunderneath.

Hydraulic unit

Y1

Y2

1

Y1

Y2

1

45


Hydraulic unit w/ pressure relief valve

Adjusting pressure relief valve

Adjust pressure relief valveRaise empty or full debris container to maximumattainable height (two-hand operation) . In thisposition hold on the two buttons and measurethe current draw of the hydraulic unit (see “tech-nical specification”). The current draw providesa measure of the opening pressure set on thepressure relief valve.

Hydraulic unit,adjust pressure relief valve ORIGINAL

– Remove hydraulic unit but do not discon-nect hydraulic hoses .

– Holding valve insert (3) with wrench, unscrewcap of pressure relief valve (1). The capconceals the valve adjusting screw.

– Continue to hold valve insert (3) with wrench,loosen lock nut (2) on valve adjusting screw.

– Using a flat screwdriver, turn adjusting screw:One-half CW turn increases current draw byroughly 4 to 5 A (approx. 10 bar, approx. 145psi).

– Finish by tightening lock nut on adjustingscrew, again installing screw cap (1).

– Install hydraulic unit: Perform function test,and measure current draw.

Hydraulic unit,adjust pressure relief valve REVISED

– Remove hydraulic unit but do not discon-nect hydraulic hoses .

– Remove screw cap (4). Cap conceals ad-justing screw (5).

– Using a stubby screwdriver, turn adjustingscrew:One-half CW turn increases current draw byroughly 4 to 5 A (approx. 10 bar, approx. 145psi).

– Finish by installing screw cap (4).– Install hydraulic unit: Perform function test,

and measure current draw.

Debris Container – No Full Ascent

Adjusting pressure relief valve

1 Cap2 Lock nut3 Valve insert4 Screw cap5 Adjusting screw

123

4 5

46


Excessive Steering Free Play

Adjusting steering free play

Adjust steering free playWear and tear and stretching of the steering chain(1) may cause excessive steering free play.If steering free play becomes too large, the steeringchain must be tighted, replaced as requiredTighten steering chain– Loosen nuts of mounting bolts (2), and tighten

chain (1) by shifting steering column (3) in elon-gated holes.

– Retighten mounting nuts.

Replace chain– Loosen nuts of mounting bolts (2), and shift

steering column (3) in elongated holes farenough to allow removal of steering chain (1).

– Install new steering chain, ensuring that frontwheel points straight ahead when steering wheelis in center (non-deflected) position.

– Tighten chain (1) by shifting steering column (3)in elongated holes.

– Retighten mounting nuts

1 Steering chain2 Mounting bolts w/ nuts3 Steering column (shaft inside)

2

1

3

47


KMR 1250 B, LPG, D

48

Hydraulic Block Diagram 0.087-964 ORIGINAL through S/N 10441

A, B Pressure connection, hydraulic unitD1 Throttle valveD2 Throttle valveD3 Throttle valveDB Pressure relief valveHP Hydraulic unitM2 Electric motor, hydraulic unitP Hydraulic pump

R1/R2 Non-return valveRB Pipe-break valveY1 Solenoid valve – Tilt debris containerY2 Solenoid valve – Raise/Lower debris

containerZ1 Lifting cylinderZ2 Tilting cylinder w/ gas strut damper

M

HP

Y2

B

M2

A

DB

Y1

R2

R1

D3

Z2Z1

RB

F

P

D2D1

KMR 1250 B, LPG, D

49

A, B Pressure connection, hydraulic unitD Throttle valveDB Pressure relief valveE Filler / purge screwF FilterHP Hydraulic unitM2 Electric motor, hydraulic unitP Hydraulic pump

R Non-return valveRB Pipe-break valveS Throttle valveY1 Solenoid valve – Tilt debris containerY2 Solenoid valve – Raise/Lower debris

containerZ1 Lifting cylinderZ2 Tilting cylinder w/ gas strut damper

Hydraulic Block Diagram 0.088-234 REVISED from S/N 10442

D

F

P

HPY1

R

Y2

B

M

M2

E

DB

S

A

RB

Z1Z2

KM

R 1250 B

, LPG

, D

50 Electrical C

ircuit Diagram

0.087-963 (KM

R 1250 B

)

Note: Unmarked wiring has cross-section of .75 sq. mm

3 1 6

-A1

X4 X5

X2 X3X1 X6

-S1

50a

30

II0 I

0,1

-G2

G

-F4(15A)

-P1h

-G1 -F1(10A)

-S3-S9

-A2

-E2 -E4

-S61

2

-S5

1

2

-Y2

-S7

1

2

4

5

-Y1

1

2

-F3(60A)

-S8

4

5

-M2

+

-

-S2

3

2

-S10

-H2

M

B/=SLP STVZO/2.1

-V1

-V2

-V3

-V4

-S4

2 5

-E1 -E3

-X1

5

-X1

1

-X1

4

-X1

6

-M1

3050a

M

-X1

2

-X1

3

1515/50

12V

/44

Ah

1,5 qmm(rt)

1,5 qmm(bl/sw)

2,5 qmm(rt/sw)

16 qmm(sw)

16 qmm(rt)

(rt/gr)

10 qmm(rt)

1,5 qmm(sw)

1,5 qmm(rt)

X11X10

-K1

1,5 qmm(sw)

1 qmm(rt/bl)

(rt/bl)(rt/bl)

1 qmm(rt/bl)

1 qmm(rt/sw)

0,75 qmm(br)

10 qmm

10 qmm(rt)

1,5 qmm(rt/sw)

1,5 qmm(ge)

H1

1 qmm(ge)

1 qmm(ge/sw)

1 qmm(ge)

1,5 qmm(rt)

2,5 qmm(rt)

(rt/sw)(sw/ws) ws

(sw)

(sw)

(ws)1,5 qmm(ge/rt) 2,5 qmm

(gr/sw)

(ge)

gn

(gr)

4

0,75 qmm(sw/rt)

30.1

2,5 qmm(rt)

1

2

0,75 qmm(ws)

2,5 qmm(ge/rt)

2,5 qmm(ge/rt)

-F2(7,5A)

-M3

M

+

-

KMR 1250 B, LPG, D

51

A1 Filter cleaning controlA2 IgnitionE1-E4 HeadlightsF1 Fuse - Filter cleaning motorF2 Fuse - control voltageF3 Fuse - Hydraulic unitF4 Fuse - AlternatorG1 BatteryG2 AlternatorH1 Indicator lamp - HeadlightsH2 HornK1 Relay - filter cleaning motorM1 StarterM2 Hydraulic unitM3 Filter cleaning motorP1 Operating hours counterS1 Ignition switchS2 Button - Filter cleaningS3 Switch - Seat contactS4 Switch - HeadlightsS5 Button - HydraulicsS6 Button - Lower ContainerS7 Button - Tilt ContainerS8 Button - Raise ContainerS9 Oil level switchS10 Button - HornV1-V4 DiodeX1 Plug, 6-pinX10/11 Contacts - Filter cleaning motorY1 Solenoid valve - Tilt debris containerY2 Solenoid valve - Raise / Lower debris

container

Detachable wiring connectionGraphic symbol for wiring connectionVehicle earth/groundFemale coupling (X1 connecting plug)Male coupling (X1 connecting plug)

bl = bluebn = brownge = yellowgr = greygn = greenrt = redor = orangers = rose (pink)sw = blackws = white

Electrical Circuit Diagram 0.087-963 (KMR 1250 B)

KM

R 1250 B

, LPG

, D

52 Electrical C

ircuit Diagram

0.088-151 (KM

R 1250 LP

G)


0,75 qmm(sw/rt)

15

MG h

5

6

M

-A2

X11X10

5

6

5

6

5

6

5

6

5

6

5

6

3

-F4(15A)

12V

/44

Ah

-M3

G1+

-

(ws)

-F3(60A)

X4 X5-F1(10A)

-F2(7,5A)

X1 X2 X3 X4

-A1

1,5 qmm(rt)

6 qmmt)

1,5 qmm(rt)

2,5 qmm(rt)

1,5 qmm(sw)

-S130

II0 I

0,1

15/50

10 qmm(rt)

30.1

50a

1,5 qmm(bl/sw)

-S9-S3

(ge)

-X1

2

2,5 qmm(rt/sw)

-S2

1

2

1

2-S5

-V1

-V2

-V3

-V4

1,5 qmm(rt/sw)

1

2-S10

1 qmm(rt/sw)

10 qmm(rt)

-H21 qmm(rt/bl)

(rt/bl) (rt/bl)

1 qmm(rt/bl)

-S6-S7 -S8

1,5 qmm(rt)

2,5 qmm(rt)

1

2

1

2

4

5

4

5

0,75 qmm(ws)

0,75 qmm(br) M

+

-

10 qmm

-M2-Y1-Y2-Y3-Y4

1

2

1

2

1

2

1

2

1 qmm(ge)

1 qmm(ge/sw)1 qmm

(ge)

-E1

-E2

-E3

-E4

1,5 qmm(ge)

63 1

2

4

5H1-S4

2,5 qmm(gr/sw)

(rt/gr)2,5 qmm(ge/rt)

2,5 qmm(sw)

(rt/sw)

(gn)

-X1

-X1

-P1

-X1-G2-M1

(ws)

-X14

1(sw/ws)

30 50a

-X1

1,5 qmm(ge/rt)

6 qmmw)

(gr)(sw)1,5 qmm(sw)

-S11

KMR 1250 B, LPG, D

53

Electrical Circuit Diagram 0.088-151 (KMR 1250 LPG)

A1 Filter cleaning controlA2 IgnitionE1-E4 HeadlightsF1 Fuse - Filter cleaning motorF2 Fuse - control voltageF3 Fuse - Hydraulic unitF4 Fuse - AlternatorG1 BatteryG2 AlternatorH1 Indicator lamp - HeadlightsH2 HornM1 StarterM2 Hydraulic unitM3 Filter cleaning motorP1 Operating hours counterS1 Ignition switchS2 Button - Filter cleaningS3 Switch - Seat contactS4 Switch - HeadlightsS5 Button - HydraulicsS6 Button - Lower ContainerS7 Button - Tilt ContainerS8 Button - Raise ContainerS9 Oil level switchS10 Button - HornS11 Button - ChokeV1-V4 DiodeX1 Connecting plug, 6-pinX10/11 Contacts - Filter cleaning motorY1 Solenoid valve - Tilt debris containerY2 Solenoid valve - Raise / Lower debris

containerY3 Solenoid valve - Fuel shutoff valveY4 Choke lifting solenoid



KM

R 1250 B

, LPG

, D

54 Electrical C

ircuit Diagram

0.088-097 (KM

R 1250 D

)


-M1

30 50a

M

G1+

--A1

X4 X5

X2 X3X1 X6

-F1(10A)

-F2(7,5A)

-M3

M -Y2

1

2 -M2

+

-

M

-S51

2-S9

-H2 -Y31

2

-E1 -E3

-E2 -E4

-S3

-F3(60A)

-S1

50a

30

II0 I

0,1

-S4

1

2

4

5

-S2

3

2 -S8

4

5

-G2 G -P1h

-F4(15A)

-S6

1

2

4

5

-Y1

1

2

-S7

1

2

4

5

-V2

-V3

-V4

-V1

-X1.

/44Ah

K1

X11X10

15/54

H1

3 6

(gn)

(rt/sw)

(rt)(br)

(br)(ws)

10 qmm

1,5qmm(ge)

1,5 qmm(sw)

1,5 qmm(rt/sw)

2,5 qmm(sw)

2,5 qmm(ge/rt)

2,5 qmm(gr/sw)

(rt/gr)

1,5 qmm(rt)

2,5 qmm(rt)

1,5 qmm(rt/sw)

1 qmm(rt/bl)

10 qmm(sw)

10 qmm(rt)

1 qmm(rt/sw)

2,5 qmm(rt/sw)

(br) (br)

(rt)(gn)(ws)

(gn/ws)

(gn/ws)

1 qmm(rt/sw)

1 qmm(rt/sw)

1,5 qmm(rt)

1,5 qmm(rt/ge)

5 qmmt)

5 qmmw)

KMR 1250 B, LPG, D

55

Electrical Circuit Diagram 0.088-097 (KMR 1250 D)

A1 Filter cleaning controlA2 IgnitionE1-E4 HeadlightsF1 Fuse – Filter cleaning motorF2 Fuse - control voltageF3 Fuse – Hydraulic unitF4 Fuse – AlternatorG1 BatteryG2 AlternatorH1 Indicator lamp – HeadlightsH2 HornM1 StarterM2 Hydraulic unitM3 Filter cleaning motorP1 Operating hours counterS1 Ignition switchS2 Button – Filter cleaningS3 Switch – Seat contactS4 Switch – HeadlightsS5 Button – HydraulicsS6 Button – Lower ContainerS7 Button – Tilt ContainerS8 Button – Raise ContainerS9 Button – HornV1-V4 DiodeX1 Connecting plug, 4-pinX10/11 Contacts – Filter cleaning motorY1 Solenoid valve – Tilt ContainerY2 Solenoid valve – Raise/Lower ContainY3 Solenoid valve – Fuel shutoff valve



KMR 1250 B, LPG, D

56

Maintenance Procedures for B, LPG & D Models

Maintenance intervalsMaintenance procedures are performed at thefollowing intervals:

Daily by operator– Check oil level– Check tire pressure– Check brush roller for wear and snagged

strings, banding, etc.– Check air cleaner/filter for damage

Weekly by operator– Check sealing lips in sweeping system for

wear and proper adjustment

Every 100 hours– Check air cleaner/filter for damage– Change engine oil– Check brush roller and side brushes for wear,

and replace as required.

By service specialist– after 8 hours– every 100 hours– every 300 hours– every 500 hours– every 1000 hours(Refer to table on opposite page.)

1-3

mm

1-5

mm

10-20 mm

WöchentlichWeekly

WartungMaintenanceKMR 1250

TäglichDaily

AlleEvery

100 h

maxmin

6 bar

KMR 1250 B, LPG, D

57

Maintenance Procedures for B, LPG & D (after operating hours)

Maintenance procedures 8 100 200 300 400 500 600 700 800 900 1000

Engine oil - check O O O O O O O O O O O

Main drive belt tension - check O O O O O O O O O O O

Main drive belt - replace O O

Engine air cleaner - clean / replace O O O O O O O O O O O

Drive chains -check for wear and tension

O O O O O O O O O O

Cooling air intake - check seal O O O O O O O O O O

Spark plugs - check / clean(B and LPG only)

O O O O O O O O O O

Spark plugs - replace(B and LPG only)

O O O

Fuel sediment cup - clean (B only) O O O O O O O O O O

LP gas cylinder - check; connect-ion must point up (LPG only)

O O O O O O O O O O

LP gas system - check for leaks(LPG only)

O O O O O O O O O O

Tire pressure - check O O O O O O O O O O

Hydraulic hoses - check O O O O O O O O O O

Hydraulic system fluid level - check O O O O O O O O O O

Control cables & all moving parts -check for easy travel

O O O O O O O O O O

Unit drive system functions - check(forward, reverse, freewheeling)

O O O O O O O O O O

Parking brake function - check O O O O O O O O O O

Debris container functions - check O O O O O O O O O O

Debris container seals - check O O O O O O O O O O

Filter shaker function - check O O O O O O O O O O

Dust filter - check / replace O O O O O O O O O O

Sealing strips in sweeping system -check for adjustment & wear

O O O O O O O O O O

Coarse-dirt hatch function - check O O O O O O O O O O

Brush roller & side brushes - check O O O O O O O O O O

Sweeping pattern, main brush roller& side brushes - check

O O O O O O O O O O

Exhaust system - check O O O O O O O O O O

Vehicle lighting - check O O O O O O O O O O

Live electrical wiring and contactpoints - check

O O O O O O O O O O

Fuel filter - change(B and LPG only)

O O O

Valve clearance - check O O O

Drive chains - replace O

CO emissions - check / analyze(LPG only)

O

KMR 1250 B, LPG, D

58

Service weight (operational) 420 kgPermitted gross weight 600 kgLength 1650 mm / 64.96 inWidth 1000 mm / 39.37 inHeight 1270 mm / 50 inDriving speed, forward, max. 7 - 8 km/hDriving speed, reverse, max. 4 - 6 km/hClimbing ability, max. 18 %Width, sweeping path w/o side brush 750 mm / 29.53 inWidth, sweeping path w/ 1 side brush 1000 mm / 39.97 inWidth, sweeping path w/ 2 side brushes 1300 mm / 51.18 inDebris container, usable capacity, max. 80 lDebris container, lifting height (min.) 1400 mm / 55.12 inDebris container, surface area, dust filter 6 m2

Debris container, lifting weight 105–115 kgDebris container, filter cleaning cycle (after-running time) 10–15 secMain brush, ground clearance, raises 10 mm / 0.39 inSweeping pattern, width 30 - 50 mm / 1.17-1.95 inMain brush, diameter 285 mm / 11.22 inMain brush, speed (at engine operating speed) 560–580 RPMSide brush, diameter 450 mm / 17.72 inSide brush, speed (at engine operating speed) 57–63 RPMCoarse dirt flap, raised (min.) 50 mm / 1.95 inCoarse dirt flap, after-running 10 - 20 mm / 0.39-0.78 inSide sealing strips, ground clearance 1 - 3 mm / 0.04-0.12 inRear selling strip, after-running 10 - 20 mm / 0.39-0.78 inTires, diameter 300 mm / 11.81 inTires, designation 4.00-4 GPRTire pressure, front 6 bar 87 psiTire pressure, rear 6 bar 87 psiTires, torque, wheel stud make-up 44 NmFuses, filter cleaning motor (F1) 10 AFuses, control voltage (F2) 7,5 AFuses, hydraulic motor (F3) 60 AFuses, generator (F4) 15 ASteering, turns, full LH / RH deflection 13/4Steering free play (on steering wheel, max.) 5°Parking brake, brake lever, tension at spring (at hydrostatic drive) 5 - 10 mm / 0.20-0.39 inImpeller fan, vacuum with closed suction hose 10 - 12 mbar / 0.1-0.2 psi

Technical specifications

KMR 1250 B, LPG, D

59

Engine, KMR 1250 B / LPG (P/N 6.491-573)Designation HONDA GX 270Type 4-StrokeNo. of cylinders 1Displacement 270 cm3

Drive belt engine, clearance with 20 N 3 - 8 mm / 0.12-0.32 inOperating speed 2.600 - 2.700 RPMIdle speed 1.250 - 1.550 RPMOutput (9 bhp at 3600 RPM) 6,6 kWfuel tank capacity (standard grade, lead-free gasoline) 6 lEngine oil capacity (SAE 15 W 40) 1,1 lBattery, maintenance-free 12 V / 44 AhStarter electricalExhaust value 0,5 %

Engine, KMR 1250 D (P/N 6.491-604)Designation YANMAR L 70 AE-DEType 4-StrokeNo. of cylinders 1Displacement 270 cm3

Drive belt engine, clearance with 20 N 3 - 8 mm / 0.12-0.32 inOperating speed 2.600 - 2.700 RPMIdle speed 1.250 - 1.550 RPMOutput (9 bhp at 3600 RPM) 6,6 kWfuel tank capacity (Diesel) 6 lEngine oil capacity (SAE 15 W 40) 1,1 lBattery, maintenance-free 12 V / 44 AhStarter electrical

Hydraulic unitClass, hydraulic fluid DIN HVLP 51524/2Type, hydraulic fluid HV 46System capacity 1,5 lProtection category splash-water protectedCurrent draw, hydraulic motor, max. 70 A(Current draw of 70 A permits liftingcontainer loadoff approx. 105–115 kg.)

Technical specifications

Noise levelMeasured in accordance with DIN 45 635 T36 and DIN 45 648 standardsat operating speed of 2700 RPM, subjective reading at operator position is 79,5 dB(A).

KMR 1250 B, LPG, D

60

Special Tools

Ignition spark tester, gasoline & LP gas engine

Mechanical tachometer (all engines)

Digital tachometer for gasoline and LP gas engine

Digital tachometer for gasolineand LP gas engineFrom a distance of approx. 100 mm (4 in.), pointthis digital tachometer at spark plug wire, andswitch on tester. Set to 4-Stroke (“4-Taktmotor”)position to read speed of running engine.

P/N 6.803-012

Mechanical tachometer for gasoline, LPgas, and diesel engineEngine speed is determined by reading enginevibrations. Tachometer is placed at suitable lo-cation on engine (e.g., valve cover). When res-onance spring is extended until deflection is larg-est with engine running, scale indicates enginespeed.

P/N 6.491-361

Ignition spark tester(for gasoline and LP gas engine)Remove spark plug connector from spark plugand push onto spark tester. Connect clamp tosuitable conductor (e.g., engine cooling fins). Ifignition is in good working condition, crankingengine with starter will produce visible sparksbetween points of spark tester.

P/N 6.491-359

KMR 1250 B, LPG, D

61

Special Tools

Multimeter w/ test probes

Spark plug wrench for gasoline and LP gas engine

MultimeterMultimeter must meet the following minimum re-quirements:– AC / DC measuring (amps, volts)– Diode test function– Resistance measuring (0-15 kΩ)

P/N 6.803-022

Spark plug wrenchfor gasoline and LP gas engineUnscrews spark plug from cylinder head.

P/N 6.815-088

Magnetic field tester

Magnetic field testerFor testing magnetic fields on solenoid valves.

P/N 6.803-003

DC/AC

kHz400V600V1000A400A

OFF

VOLTCRAFT

PeakHold

113 CLAMP METER

COM

400

HzV

KMR 1250 B, LPG, D

62

Dual-function hand pump

Leak detection spray

Dual-function hand pumpFor checking integrity of diaphragm in LP gasregulators (LP gas engines). Hand pump fea-tures switchover valve to generate vacuum orpressure (Pressure / Vacuum mode).

P/N 6.473-400

Leak detection spray (for LP gas engines)Indispensable when checking LP gas systemfor leaks.

P/N 6.282-033

CO Tester for LPG engine

CO testerMeasures CO component in exhaust emissions.

– Measuring range > 2% CO content– Resolution: 0.01%– Includes suction pump– LCD display

Special Tools

KMR 1250 B, LPG, D

63

Index

A

Adjusthydrostatic transmission 24parking brake 32pressure relief valve 45sealing lips / sealing strips 41steering free play 46

Adjusting screw, idle mixture 8Alternator 51, 53, 55

B

Battery 51, 53, 55Brush Roller

No Rotation 35Poor Performance 33, 34

Brush roller 14, 15Button

Choke 53clean dust filter 7Filter cleaning 53, 55Filter shaker 51Horn 7, 51, 53, 55Hydraulics 51, 53, 55Lower Container 51, 53, 55lower debris container 7Raise Container 51, 53, 55raise debris container 7Tilt Container 51, 53, 55tilt debris container 7two-hand operation, hydraulic 7

C

Carburetor 10Chain, steering 14Change engine oil 26, 30Check

air cleaner element 30battery voltage 16coarse debris flap 38compression release lever 20control cable 33, 36drive belt side brush 36drive pedal 22, 23dust pickup 39engine oil level 26, 30filter receptacle 38freewheeling function 21fuel solenoid valve 31fuse 16hydraulic unit 43, 44ignition switch 16input voltage 42oil level switch 19regulator 18rubber sleeve 37seal 40

sealing lips 41seat contact switch 19solenoid valves 43spark plug 19starter M1 17terminals 42tire pressure 33, 40voltage 17

Check / replaceBrush roller drive belt 35Sweeping drive belt 35

Choke 7lifting solenoid 53system function 9

Clean air filter element 26Clean sediment bowl 27CO tester 62Coarse-dirt flap 15Connecting plug, 4-pin 55Connecting plug, 6-pin 53Contacts - Filter cleaning motor 51, 53, 55Controls 7

D

Debris ContainerNo Full Ascent 45Very Slow Ascent 44

Debris container 58Debris container, lowered / raised 15Descent stop valve 49Diesel Engine (YANMAR L 70 AE-DE) 12, 13Diesel fuel 20Digital tachometer 60Diode 51, 53, 55Drive belt

brush roller 14hydrostatic transmission 14LH side brush 14RH side brush 14impeller fan 14

drive chain RH 14Drive pedal 7Drive shaft 12Drive system 4Driver seat 6Driving and sweeping data 58Dual-function hand pump 62Dust filter 15

E

Electric motor, hydraulic unit 48, 49Electrical Circuit Diagram 50, 51, 52, 53, 54, 55Engine 6, 10, 14, 15

KMR 1250 B 5KMR 1250 B / LPG 59KMR 1250 D 5, 59KMR 1250 LPG 5

KMR 1250 B, LPG, D

64

Engine Runsbut Machine Fails to Move 21, 22, 23, 24, 25

Excessive Steering Free Play 46Excessive Unit Dusting 37, 38, 39, 40, 41

F

Filter 49Filter cleaning control 51, 53, 55Filter cleaning motor 51, 53, 55

No Function 42Flange 13Float chamber equalization 9Float system 9Front wheel 6, 15Fuel feed line 12, 13Fuel tank for KMR B / D 6Full load operation 9Fuse 58

Alternator 51, 53, 55control voltage 51, 53, 55Filter cleaning motor 51, 53, 55Hydraulic unit 51, 53, 55

G

Gas cylinder (LP Gas) 6Gas regulator 11Gas system 11Gasoline Engine

(HONDA GX 270) 8, 9

H

Head lights 6Headlight switch 7Headlights 51, 53, 55HONDA GX 270 5Horn 51, 53, 55Hydraulic Block Diagram 48, 49Hydraulic Unit

No Function 43Hydraulic unit 15, 48, 49, 51, 53, 55, 59

adjust pressure relief valve 45Hydrostatic transmission 14, 15, 25

I

Idling operation 9Ignition 51, 53, 55Ignition spark tester 60Ignition switch 7, 51, 53, 55Impeller fan 14, 15, 39Indicator lamp

Headlights 51, 53, 55Injection pump 13Injection system 12Injector assembly 13

L

Leak detection spray 62Lever

brush roller 7coarse-dirt flap 7dust pickup 7LH side brush 7parking brake 7RH side brush 7

Side brush 6LH drive chain 14LH side brush 14Lifting cylinder 48, 49Lifting mechanism 6LP Gas Engine

(HONDA GX 270) 10, 11

M

Magnetic field tester 61Maintenance intervals 56Maintenance Procedures

(diesel engine) 30, 31(gasoline and LPG engine) 26, 27(LPG engine) 28B, LPG & D Model 57B, LPG & D Models 56

Mechanical tachometer for gasoline, LP gas, and di 60Mixture control screw (MAX eng. speed) 10Mixture control screw (MIN eng. speed) 10Multimeter 61

N

Noise level 59Non-return valve 48, 49

O

Oil level sensor 51, 53Operating hours counter 7, 51, 53, 55Operating time 59Operator seat 15

P

Parking BrakeNo Function 32

Partial load operation 9Pipe-break valve 48, 49Plug, 6-pin 51Pressure connection, hydraulic unit 48, 49Pressure relief valve 48, 49Purge lifting cylinder 44

R

Rear wheel 15Rear wheel, chain-driven 6Relay - filter cleaning motor 51

KMR 1250 B, LPG, D

65

Replacebrush roller 33chain 46dust filter 37

Side brush 6

S

Set CO value 28, 29Operating RPM adjustment 27, 29, 31Set engine operating speed 31Side brush 15

Poor Sweeping Performance 36side brush 6, 14Solenoid valve

Fuel shutoff valve 53, 55Raise/Lower Container 48, 49, 51, 53, 55Tilt Container 48, 49, 51, 53, 55

Spark plug wrench 61Special Tools 60, 61Starter 51, 53, 55

Fails to Turn Engine 16, 17, 18Turns Engine but Engine Fails to Start 19, 20

Steering 58Steering and Drive Power 14Steering wheel 6, 14, 15Suction and filtering system 4Sweeping mechanism 58Sweeping pattern – Check / adjust 36Sweeping system 4, 15Switch

Headlights 51, 53, 55Seat contact 51, 53, 55

T

tank capacity 59Technical specifications 58, 59Throttle lever 7Throttle valve 48, 49Tighten steering chain 46Tilting cylinder w/ gas strut assist 48, 49Tires 58Top up engine oil 26, 30Transmission drive belt 21two-hand operation 4, 7, 43, 45

V

View from front 6

W

Weights and dimensions 58

Y

YANMAR L 70 AE-DE 5, 12, 13, 59

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